N°5621 Move showdown 2.0.0-alpha1 to NPM

Current file header is : /*! showdown v 2.0.0-alpha1 - 25-09-2018 */

Official 2.0.0-alpha doesn't match neither on content nor date :(
Considering date we would be at 1.8.7, but it is also quite different (and has vulnerabilities)
In consequence switching to 2.0.0.

node_modules/is-fullwidth-code-point/package.json

@@ -0,0 +1,42 @@
+{
+	"name": "is-fullwidth-code-point",
+	"version": "3.0.0",
+	"description": "Check if the character represented by a given Unicode code point is fullwidth",
+	"license": "MIT",
+	"repository": "sindresorhus/is-fullwidth-code-point",
+	"author": {
+		"name": "Sindre Sorhus",
+		"email": "sindresorhus@gmail.com",
+		"url": "sindresorhus.com"
+	},
+	"engines": {
+		"node": ">=8"
+	},
+	"scripts": {
+		"test": "xo && ava && tsd-check"
+	},
+	"files": [
+		"index.js",
+		"index.d.ts"
+	],
+	"keywords": [
+		"fullwidth",
+		"full-width",
+		"full",
+		"width",
+		"unicode",
+		"character",
+		"string",
+		"codepoint",
+		"code",
+		"point",
+		"is",
+		"detect",
+		"check"
+	],
+	"devDependencies": {
+		"ava": "^1.3.1",
+		"tsd-check": "^0.5.0",
+		"xo": "^0.24.0"
+	}
+}